NEET (UG) – 2022

Questions & Answers

1. If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately

(1) 2.5 meters
(2) 2.2 meters
(3) 2.7 meters
(4) 2.0 meters

2. Bilaterally symmetrical and acoelomate animals are exemplified by
(1) Platyhelminthes
(2) Aschelminthes
(3) Annelida
(4) Ctenophora

3. Match the following columns and select the correct option.
Column-I                                       Column-II
(a) Gregarious,                            (i) Asterias polyphagous pest
(b) Adult with radial                  (ii) Scorpion symmetry and larva with bilateralsymmetry
(c) Book lungs                             (iii) Ctenoplana
(d) Bioluminescence                  (iv) Locusta

(a) (b) (c) (d)
(1) (iv) (i) (ii) (iii)
(2) (iii) (ii) (i) (iv)
(3) (ii) (i) (iii) (iv)
(4) (i) (iii) (ii) (iv)

4. Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
(1) Peroxisomes
(2) Golgi bodies
(3) Polysomes
(4) Endoplasmic reticulum

5. The QRS complex in a standard ECG represents
(1) Depolarisation of auricles
(2) Depolarisation of ventricles
(3) Repolarisation of ventricles
(4) Repolarisation of auricles

6. Match the following columns and select the  correct option.
Column-I                                 Column-II
(a) Floating Ribs                     (i) Located between second and seventh ribs
(b) Acromion                          (ii) Head of the Humerus
(c) Scapula                              (iii)Clavicle
(d) Glenoid cavity                  (iv) Do not connect with the sternum

(a) (b) (c) (d)
(1) (i) (iii) (ii) (iv)
(2) (iii) (ii) (iv) (i)
(3) (iv) (iii) (i) (ii)
(4) (ii) (iv) (i) (iii)

7. Experimental verification of the chromosomal theory of inheritance was done by
(1) Sutton
(2) Boveri
(3) Morgan
(4) Mendel

8. Identify the incorrect statement.
(1) Sapwood is involved in conduction of water and minerals from root to leaf
(2) Sapwood is the innermost secondary xylem and is lighter in colour
(3) Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
(4) Heart wood does not conduct water but gives mechanical support

9.Identify the substances having glycosidic bond and peptide bond, respectively in their structure
(1) Glycerol, trypsin         (2) Cellulose, lecithin
(3) Inulin, insulin             (4) Chitin, cholesterol

10. Name the enzyme that facilitates opening of DNA helix during transcription.
(1) DNA helicase             (2) DNA polymerase
(3) RNA polymerase      (4) DNA ligase

11.If the head of cockroach is removed, it may live for few days because
(1) the cockroach does not have nervous system.
(2) the head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
(3) the head holds a 1/3rd of a nervous system while the rest is situated along the dorsal part of its body.
(4) the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.

12. Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
(1) (c) and (d)          (2) (a), (b) and (d)
(3) only (d)               (4) (a) and (b)

13. By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?

(1) Mutational breeding
(2) Cross breeding
(3) Inbreeding
(4) Out crossing

14. Which one of the following is the most abundant protein in the animals?
(1) Collagen           (2) Lectin
(3) Insulin             (4) Haemoglobin

15. How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
(1) 2            (2) 14
(3) 8           (4) 4

16.The body of the ovule is fused within the funicle at
(1) Micropyle (2) Nucellus
(3) Chalaza (4) Hilum
Answer (4)
17. Which of the following is correct about viroids?
(1) They have free RNA without protein coat
(2) They have DNA with protein coat
(3) They have free DNA without protein coat
(4) They have RNA with protein coat

18. The number of substrate level phosphorylations in one turn of citric acid cycle is
(1) One (2) Two
(3) Three (4) Zero

19. The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are
(1) Nitrate alone
(2) Ammonia and oxygen
(3) Ammonia and hydrogen
(4) Ammonia alone

20.From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask
(1) CH3, H2, NH4 and water vapor at 800°C
(2) CH4, H2, NH3 and water vapor at 600°C
(3) CH3, H2, NH3 and water vapor at 600°C
(4) CH4, H2, NH3 and water vapor at 800°C

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